Drill-extractor.



W. W. WILSON.

- DRILL EXTRACTOR.

APPLICATION FILED Aus.31. I936- 1,213,989; Patented Jan.3 0,1917.-

WWW 7147M WiZi azz/ WILLIAM W. WILSON, F WONDER, NEVADA.

DRILL-EXTRACTOR.

Specification of Letters Patent.

Patented Jan. 30, 1917.

Application filed August 31, 1916. Serial No. 117,896.

To all whom it may concern:

Be it known that 1, WILLIAM W. VVILsoN, a citizen of the United States, residing at lVonder, in the county of Churchill, State of Nevada, have invented a new and useful Drill-Extractor; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to an improved extractor for extracting mine drills and the like. Heretofore, such drills, when stuck, were removed by some suitable twisting tool or wrench, which was very tedious, or by drilling a hole adjacent the stuck drill, which received blasting material for blasting the drill from its place. These methods have been found impractical, and moreover, when blasting a drill which has become stuck, the same is so distorted or otherwise bent, that it is practically useless.

Therefore, the object of the present invention is to provide an improved device for extracting stuck drills, substantially in as perfect condition as when first used.

A further object of the invention is to provide an extractor of this kind, which is fulcrumed, that one end may be connected to the stuck drill, and to the opposite end of which pneumatic hammer blows may be imparted, so that the drill may be extracted.

in practical fields, the details of construction may necessitate alterations falling within the scope of what is claimed.

The invention comprises further features and combination of parts, as hereinafter set forth, shown in the drawings, and claimed.

In the drawings :Figure 1 is a view in side elevation of the improved drill extractor, showing the application of the same. Fig. 2 is a plan view of the extractor. Fig. 3 is a sectional View on line 3-3 of Fig. 2.

Referring more especially to the drawings, 1 designates the roof of a mine, and 2 a drill, which, in cross section, is four winged angular, in other words, four wings, each extending at right angles to an adjacent wing, and 3 denotes a support, which is similar in shape and contour to the drill 2.

The extractor comprises an elongated plate 4, having a slot 5, and provided at both ends with downwardly extending L-shaped portions 6, the bases 7 of which extend in opposite directions. Secured to the opposite sides of said bases by means of rivets 8, are elongated metallic strips or plates 9. The central portions 10 of these stripsor plates 9 are bowed or spread apart, thereby widening the space between said strips or plates 9, wider than the slot of the plate 4. Pivoted in the space between the bowed portions 10 of said strips 9, and on a pin 11 (which is secured in place transversely of said strips by means of the cotter pin 12) is achuck block 13. This chuck block or member 13 is provided with an opening 14 corresponding with and receiving the support 3. The opposite extremities of the strips or plates 9 are bowed or bent outwardly and extended beyond said L-shaped portions, so that the spaces 15 between said extremities are wider than the thickness of said L- shaped portions. Pivoted on a pin 16 in one of'the spaces 15 of the'extremiti'es of said strips 9 adjacent the drill 2 is a chuck block 17, which is provided with an opening 18, corresponding to the cross sectional shape of and receiving the drill 2. The pin 16 is held transversely of the extremities adjacent the drill 2 by means of the cotter pin 19. Secured transversely of the extremities 20 of said strips or plates 9 by means of a cotter pin 21 is a pivot pin 22, and pivoted on the pin 22 is a shank member 23 similar in cross section to the support 3 and drill 2. As shown, when extracting a mine drill, the support engages the roof or the wall of the mine, as shown in Fig. 1, so that the chuck block 17 may engage the mine drill, the support 3 extending through the opening 14 of the chuck block 13, a pneumatic hammer 24 engages the free extremity of the shank 23, so that by successive pneumatic hammer blows, the body of the extractor is oscillated upon its fulcrum 11, thereby causing the support 3 and the drill 2 to bind in the openings 14 and 18 of said chuck blocks, and when these blows are successively repeated, the drill 2 is gradually extracted or withdrawn, and-in extracting the drill, the body of the extractor pivotsor fulcrums upon the pin 11. It is to be noted that the support 3 and the drill 2 do not fit exactly close in respective openings 14 and 18, therefore, after each pneumatic hammer blow, the operator will hold the extractor firm or steady, so that the chuck blocks will take new grips or holds on the support and drill, thereby avoiding any readjustment of the parts of the extractor, until the drill is extracted. port passes through the slot 5 of the plate 1'. The invention having been set forth, what is claimed as new and useful, is

1. In a mine drill extractor, the combination of a support and an extractor body,

the width of which is substantially the width of the support, and through which slot the support extends to guide and reinforce the extractor body. I

2. In a mine drillextractor, the combination of a support and an extractor body, of a chuck block mounted on the support where- Gopies of this patent may be obtained for It is to be noted that the supby it will chuck or bind thereon, and on which the drill body is fulcrumed substantially midway the ends of the body, a chuck block pivoted at one end of the drill body and having an opening to receive the mine drill, whereby the second chuck block will intermittently chuck or bind on the drill, and means for imparting rapid successive hammer blows to the opposite ends of the extractor body, whereby the drill may be extracted, said extractor body comprising a. pair of opposing elongated strips, an elongated plate having an elongated slot of a width substantially equally the width of the support transversely andreceiving the support, thereby guiding and reinforcing the extractor body,said slotted plate having L-shaped portions at its oppo'siteends secured between and spacing said strips.

In testimony whereof I have signed my name to this specification inthe presence of two subscribing witnesses. V

L. L. CHANs'LoR, I J. G. GARBUTT.

five cents each, By addressing'the Commissioner of Patents,

walhington, D. c. 

